How can I guarantee a solvable Fifteen Puzzle shuffle?
- by Codemiester
I am making a 15 Puzzle game in C# that allows the user to enter a custom row and column value up to a maximum of a 10 x 10 puzzle. I am having problems with the shuffle method.
I want to make it so the puzzle is always solvable by first creating a winning puzzle then shuffling the empty space. The problem is it is too inefficient to call every click event each time. I need a way to invoke the click event of a button adjacent to the empty space but not diagonal. I also use an invisible static button for the empty spot. The PuzzlePiece class inherits from Button. I am not too sure how to do this.
Here is what I have:
private void shuffleBoard()
{
//5 is just for test purposes
for (int i = 0; i < 5; i++)
{
foreach (Control item in this.Controls)
{
if (item is PuzzlePiece)
{
((PuzzlePiece)item).PerformClick();
}
}
}
}
void PuzzlePiece_Click(object sender, EventArgs e)
{
PuzzlePiece piece = (PuzzlePiece)sender;
if (piece.Right == puzzleForm.emptyPiece.Left && piece.Top == puzzleForm.emptyPiece.Top)
{
movePiece(piece);
}
else if (piece.Left == puzzleForm.emptyPiece.Right && piece.Top == puzzleForm.emptyPiece.Top)
{
movePiece(piece);
}
else if (piece.Top == puzzleForm.emptyPiece.Bottom && piece.Left == puzzleForm.emptyPiece.Left)
{
movePiece(piece);
}
else if (piece.Bottom == puzzleForm.emptyPiece.Top && piece.Left == puzzleForm.emptyPiece.Left)
{
movePiece(piece);
}
}
